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https://issues.apache.org/jira/browse/HIVE-18291?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16301874#comment-16301874
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Sergey Shelukhin commented on HIVE-18291:
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There's a JIRA for this somewhere already, and IIRC I even had a partial patch.
The problem as mentioned above is the default behavior. In the perfect world, a
config flag needs to be added, but given a number of places where that would
need to be checked, it's a big pain so seems noone has picked it up.
> An exception should be raised if the result is outside the range of decimal
> ---------------------------------------------------------------------------
>
> Key: HIVE-18291
> URL: https://issues.apache.org/jira/browse/HIVE-18291
> Project: Hive
> Issue Type: Sub-task
> Components: SQL
> Affects Versions: 2.3.0
> Reporter: Marco Gaido
> Assignee: Daniel Voros
>
> Citing SQL:2011 on page 27 available at
> http://standards.iso.org/ittf/PubliclyAvailableStandards/c053681_ISO_IEC_9075-1_2011.zip:
> {noformat}
> If the result cannot be represented exactly in the result type, then whether
> it is rounded
> or truncated is implementation-defined. An exception condition is raised if
> the result is
> outside the range of numeric values of the result type, or if the arithmetic
> operation
> is not defined for the operands.
> {noformat}
> Currently Hive is returning NULL instead of throwing an exception if the
> result is out of range, eg.:
> {code}
> > select 1000000000000000000.000001*1000000000000000000.000001;
> +-------+
> | _c0 |
> +-------+
> | NULL |
> +-------+
> {code}
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